[Mgs] ZDDP in oil

[Charles & Peggy Robinson]

   This whole issue torques my jaws!  I've been building engines for 
more years than I care to remember and never used "break-in oil."  I 
always used good quality oil and let the engine tolerances dictate what 
viscosity to pour in there.  Fer instance, if I did a ring,valve and 
bearing rebuild and could put std bearings back in, the engine didn't 
need thinner oil than usual.  Shux, it came out of there after the first 
thousand miles, anyhoo.  New rebuilds with turned cranks and rebored 
holes built to tight tolerances got thinner oil to begin with.  Sheesh, 
break-in oil, for sooth.

   I know it's a different world today, ON NEW CARS, as far as which 
oils come in them.  However, I bought a Ford P/U last year and it came 
with a 5W-20 dino/syn blend in the engine.  The same stuff went back in 
there on the first oil change.  No dedicated "break-in" oil.  That 
stuff's a scam, IMO.

   As far as engineering studies go, I believe you have to consider the 
source.  IOW, who funded the study?  If oil provider "A" funded the 
study are the engineers going to bite the hand that signs their 
paycheck?  Gawd, it's all smoke and mirrors.

   My B gets the Valvoline, mainly because it's available locally.

   CR







Mike Duvall wrote:
> A lot of older, motorcycle, diesel (CI-4) and racing oils have ZDDP  
> along with a number of brands. Some people worry about diesel oils  
> but some meet diesel and gas standards.  Royal Purple sells a break  
> in oil and then recommends standard oils.
> 
> I personally am not worried about it the issue.  (I suspect the  
> problems are really from using synthetic instead of break in oil)